An term used for unimportant variables in programming when the programmer is too lazy to think of an actual name. The origin of such word is described in detail in RFC 3092.
A (presence/force/being/no one really knows) that is the biggest threat to our civilisation and could collapse all economies around the world in an instant. Luckily the Foo fighters have been fighting the foo and protecting our delicate social constructs from this almighty enemy.
Bro 1 - ~ literally nothing ~
Bro 2 - Thank fuck for the foo fighters
Bro 1 - tell me about it, i wouldn’t be able to sleep if it wasn’t for those bloody legends
The word origionated with Mr.T. Due to the extended contact with cheap substitute gold, he can no longer tell the difference between anybody he meets. In order to save himself the humiliation of asking who he's talking to, he simply refers to anyone and every one as 'foo' or 'sucka'.